Online Computer Terms Dictionary - H

Hal/S

<language> (Hal/Shuttle) A real-time high-level language for flight
control applications. Hal was developed for NASA by Intermetrics, Inc. in the
1970s for on-board software. The initial version was a Fortran preprocessor,
written in Fortran. In 1972, as the space shuttle project advanced, the language
was renamed Hal/S and made more adaptable to architecture of different computers
by using XPL. In all, 11 different implementations, mostly based on IBM 360,
were created. Applications also included projects by JPL (Galileo probe, Deep
Space network).